An X-ray fluoroscopy imaging apparatus that confirms the radiation field of a radiation imaging when an operator performs an examination in an operation room. A collimator 12 has a plurality of collimator-leaves 61 positioned and forming a first X-ray radiation field E1 while performing an X-ray fluoroscopy. The apparatus allows an operator, in an operating room distant from an imaging room, to operate an aperture change to confirm the radiation field and each of the collimator-leaves 61 shifts to a position where the X-ray radiation field is reduced to a smaller dimension field E2. Visualizing a displayed X-ray image allows the operator to confirm reaching the radiation field E2.
